/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 13:25:53,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 13:25:53,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 13:25:53,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 13:25:53,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 13:25:53,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 13:25:53,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 13:25:53,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-17 13:25:53,240 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 13:25:53,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 13:25:53,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 13:25:53,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 13:25:53,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 13:25:53,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 13:25:53,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 13:25:53,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 13:25:53,243 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 13:25:53,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 13:25:53,243 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 13:25:53,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 13:25:53,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 13:25:53,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 13:25:53,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 13:25:53,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 13:25:53,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 13:25:53,245 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 13:25:53,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 13:25:53,245 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 13:25:53,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 13:25:53,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 13:25:53,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 13:25:53,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 13:25:53,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 13:25:53,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 13:25:53,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 13:25:53,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 13:25:53,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 13:25:53,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 13:25:53,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 13:25:53,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 13:25:53,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 13:25:53,381 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 13:25:53,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-03-17 13:25:53,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58daf845/791624961dba4c999964b6034e1ffd75/FLAG61dd31e55 [2022-03-17 13:25:54,115 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 13:25:54,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-03-17 13:25:54,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58daf845/791624961dba4c999964b6034e1ffd75/FLAG61dd31e55 [2022-03-17 13:25:54,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58daf845/791624961dba4c999964b6034e1ffd75 [2022-03-17 13:25:54,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 13:25:54,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 13:25:54,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 13:25:54,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 13:25:54,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 13:25:54,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482e5dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54, skipping insertion in model container [2022-03-17 13:25:54,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 13:25:54,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 13:25:54,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2022-03-17 13:25:54,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 13:25:54,457 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 13:25:54,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2022-03-17 13:25:54,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 13:25:54,504 INFO L208 MainTranslator]: Completed translation [2022-03-17 13:25:54,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54 WrapperNode [2022-03-17 13:25:54,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 13:25:54,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 13:25:54,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 13:25:54,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 13:25:54,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 13:25:54,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 13:25:54,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 13:25:54,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 13:25:54,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (1/1) ... [2022-03-17 13:25:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 13:25:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:54,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 13:25:54,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 13:25:54,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 13:25:54,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 13:25:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 13:25:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 13:25:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 13:25:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 13:25:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 13:25:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 13:25:54,758 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 13:25:54,759 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 13:25:54,907 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 13:25:54,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 13:25:54,911 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 13:25:54,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 01:25:54 BoogieIcfgContainer [2022-03-17 13:25:54,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 13:25:54,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 13:25:54,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 13:25:54,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 13:25:54,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 01:25:54" (1/3) ... [2022-03-17 13:25:54,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c4e3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:25:54, skipping insertion in model container [2022-03-17 13:25:54,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:25:54" (2/3) ... [2022-03-17 13:25:54,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c4e3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:25:54, skipping insertion in model container [2022-03-17 13:25:54,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 01:25:54" (3/3) ... [2022-03-17 13:25:54,939 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2022-03-17 13:25:54,942 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 13:25:54,943 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 13:25:55,062 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 13:25:55,068 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 13:25:55,068 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 13:25:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 13:25:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 13:25:55,091 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:55,091 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:55,092 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2022-03-17 13:25:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:55,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551508596] [2022-03-17 13:25:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:55,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:55,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 13:25:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 13:25:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 13:25:55,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551508596] [2022-03-17 13:25:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551508596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 13:25:55,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 13:25:55,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 13:25:55,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433407613] [2022-03-17 13:25:55,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 13:25:55,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 13:25:55,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 13:25:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 13:25:55,420 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 13:25:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:55,513 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-17 13:25:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 13:25:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 13:25:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:55,524 INFO L225 Difference]: With dead ends: 47 [2022-03-17 13:25:55,524 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 13:25:55,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 13:25:55,545 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:55,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 13:25:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 13:25:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 13:25:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 13:25:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-17 13:25:55,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-17 13:25:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:55,597 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-17 13:25:55,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 13:25:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-17 13:25:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 13:25:55,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:55,598 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:55,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 13:25:55,599 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2022-03-17 13:25:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:55,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518264030] [2022-03-17 13:25:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:55,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:55,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23135786] [2022-03-17 13:25:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:55,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:55,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:55,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 13:25:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 13:25:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 13:25:55,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 13:25:55,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518264030] [2022-03-17 13:25:55,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23135786] [2022-03-17 13:25:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23135786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 13:25:55,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 13:25:55,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 13:25:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443288713] [2022-03-17 13:25:55,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 13:25:55,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 13:25:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 13:25:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 13:25:55,853 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 13:25:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:55,930 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-17 13:25:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 13:25:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 13:25:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:55,934 INFO L225 Difference]: With dead ends: 34 [2022-03-17 13:25:55,937 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 13:25:55,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 13:25:55,939 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:55,939 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:25:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 13:25:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 13:25:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 13:25:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-17 13:25:55,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-17 13:25:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:55,971 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-17 13:25:55,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 13:25:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-17 13:25:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 13:25:55,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:55,973 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:55,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:56,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:56,190 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2022-03-17 13:25:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:56,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074355656] [2022-03-17 13:25:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:56,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319693274] [2022-03-17 13:25:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:56,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:56,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:56,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 13:25:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:56,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 13:25:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 13:25:56,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:25:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 13:25:56,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074355656] [2022-03-17 13:25:56,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319693274] [2022-03-17 13:25:56,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319693274] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 13:25:56,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:25:56,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 13:25:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867960761] [2022-03-17 13:25:56,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 13:25:56,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 13:25:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 13:25:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 13:25:56,596 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 13:25:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:56,636 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-17 13:25:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 13:25:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-17 13:25:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:56,638 INFO L225 Difference]: With dead ends: 36 [2022-03-17 13:25:56,638 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 13:25:56,639 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 13:25:56,640 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:56,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 13:25:56,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 13:25:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 13:25:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 13:25:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-17 13:25:56,650 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-17 13:25:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:56,651 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-17 13:25:56,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 13:25:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-17 13:25:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 13:25:56,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:56,652 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:56,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:56,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 13:25:56,868 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2022-03-17 13:25:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259881196] [2022-03-17 13:25:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:56,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172214756] [2022-03-17 13:25:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:56,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:56,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 13:25:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:25:56,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 13:25:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 13:25:57,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:25:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259881196] [2022-03-17 13:25:57,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172214756] [2022-03-17 13:25:57,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172214756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:25:57,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:25:57,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 13:25:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132722859] [2022-03-17 13:25:57,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:25:57,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 13:25:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 13:25:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 13:25:57,338 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 13:25:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:57,387 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-17 13:25:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 13:25:57,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-17 13:25:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:57,388 INFO L225 Difference]: With dead ends: 39 [2022-03-17 13:25:57,388 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 13:25:57,388 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 13:25:57,389 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:57,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 13:25:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 13:25:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 13:25:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 13:25:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-17 13:25:57,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-17 13:25:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:57,393 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-17 13:25:57,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 13:25:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-17 13:25:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 13:25:57,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:57,394 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:57,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:57,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:57,607 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 2 times [2022-03-17 13:25:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:57,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290945064] [2022-03-17 13:25:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:57,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333582956] [2022-03-17 13:25:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 13:25:57,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:57,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:57,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 13:25:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 13:25:57,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:25:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 13:25:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 13:25:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:25:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:57,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290945064] [2022-03-17 13:25:57,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:57,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333582956] [2022-03-17 13:25:57,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333582956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:25:57,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:25:57,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 13:25:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739587044] [2022-03-17 13:25:57,915 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:25:57,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 13:25:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 13:25:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 13:25:57,915 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 13:25:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:57,984 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-17 13:25:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 13:25:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-17 13:25:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:57,986 INFO L225 Difference]: With dead ends: 42 [2022-03-17 13:25:57,986 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 13:25:57,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-17 13:25:57,986 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:57,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 13:25:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 13:25:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 13:25:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 13:25:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-17 13:25:57,991 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-17 13:25:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:57,991 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-17 13:25:57,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 13:25:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-17 13:25:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 13:25:57,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:57,992 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:58,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:58,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:58,209 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 3 times [2022-03-17 13:25:58,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4243338] [2022-03-17 13:25:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:58,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:58,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:58,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942640735] [2022-03-17 13:25:58,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 13:25:58,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:58,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:58,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:58,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 13:25:58,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 13:25:58,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:25:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 13:25:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 13:25:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:25:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4243338] [2022-03-17 13:25:58,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942640735] [2022-03-17 13:25:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942640735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:25:58,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:25:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 13:25:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614318853] [2022-03-17 13:25:58,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:25:58,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 13:25:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 13:25:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 13:25:58,652 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 13:25:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:58,736 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-17 13:25:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 13:25:58,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-17 13:25:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:58,737 INFO L225 Difference]: With dead ends: 45 [2022-03-17 13:25:58,737 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 13:25:58,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-17 13:25:58,738 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:58,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 13:25:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 13:25:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 13:25:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 13:25:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-17 13:25:58,743 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-17 13:25:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:58,743 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-17 13:25:58,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 13:25:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-17 13:25:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 13:25:58,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:58,744 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:58,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:58,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:58,949 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 4 times [2022-03-17 13:25:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:58,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255614160] [2022-03-17 13:25:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:58,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:58,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738840762] [2022-03-17 13:25:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 13:25:58,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:58,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:58,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 13:25:59,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 13:25:59,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:25:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 13:25:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:25:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 13:25:59,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:25:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:25:59,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255614160] [2022-03-17 13:25:59,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:25:59,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738840762] [2022-03-17 13:25:59,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738840762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:25:59,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:25:59,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-17 13:25:59,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133230624] [2022-03-17 13:25:59,431 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:25:59,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 13:25:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:25:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 13:25:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 13:25:59,432 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-17 13:25:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:25:59,513 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-17 13:25:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 13:25:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-17 13:25:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:25:59,514 INFO L225 Difference]: With dead ends: 48 [2022-03-17 13:25:59,514 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 13:25:59,515 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-17 13:25:59,515 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:25:59,515 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:25:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 13:25:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-17 13:25:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 13:25:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-17 13:25:59,520 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-17 13:25:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:25:59,520 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-17 13:25:59,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-17 13:25:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-17 13:25:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 13:25:59,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:25:59,521 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:25:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 13:25:59,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:59,731 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:25:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:25:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 5 times [2022-03-17 13:25:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:25:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501414392] [2022-03-17 13:25:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:25:59,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:25:59,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:25:59,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007121496] [2022-03-17 13:25:59,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 13:25:59,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:25:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:25:59,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:25:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 13:25:59,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-17 13:25:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:25:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 13:25:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 13:26:00,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:00,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501414392] [2022-03-17 13:26:00,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007121496] [2022-03-17 13:26:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007121496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:00,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 13:26:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530080207] [2022-03-17 13:26:00,180 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:00,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 13:26:00,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 13:26:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-17 13:26:00,181 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 13:26:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:00,288 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-17 13:26:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 13:26:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-17 13:26:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:00,289 INFO L225 Difference]: With dead ends: 51 [2022-03-17 13:26:00,289 INFO L226 Difference]: Without dead ends: 46 [2022-03-17 13:26:00,289 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-17 13:26:00,289 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:00,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:26:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-17 13:26:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-17 13:26:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 13:26:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-17 13:26:00,295 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-17 13:26:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:00,295 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-17 13:26:00,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 13:26:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-17 13:26:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-17 13:26:00,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:00,296 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:00,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:00,501 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 6 times [2022-03-17 13:26:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:00,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067595210] [2022-03-17 13:26:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:00,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:00,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586401928] [2022-03-17 13:26:00,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 13:26:00,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:00,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:00,509 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:00,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 13:26:00,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-17 13:26:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 13:26:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 13:26:00,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:01,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067595210] [2022-03-17 13:26:01,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586401928] [2022-03-17 13:26:01,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586401928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:01,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:01,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-17 13:26:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063777108] [2022-03-17 13:26:01,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:01,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 13:26:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 13:26:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 13:26:01,011 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-17 13:26:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:01,139 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-17 13:26:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 13:26:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-17 13:26:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:01,140 INFO L225 Difference]: With dead ends: 54 [2022-03-17 13:26:01,140 INFO L226 Difference]: Without dead ends: 49 [2022-03-17 13:26:01,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-17 13:26:01,141 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:01,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:26:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-17 13:26:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-17 13:26:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 13:26:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-17 13:26:01,146 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-17 13:26:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:01,146 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-17 13:26:01,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-17 13:26:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-17 13:26:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 13:26:01,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:01,147 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:01,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:01,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 13:26:01,351 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 7 times [2022-03-17 13:26:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038458050] [2022-03-17 13:26:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:01,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:01,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208837735] [2022-03-17 13:26:01,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 13:26:01,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:01,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:01,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 13:26:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:26:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 13:26:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 13:26:01,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:02,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038458050] [2022-03-17 13:26:02,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208837735] [2022-03-17 13:26:02,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208837735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:02,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:02,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 13:26:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451172352] [2022-03-17 13:26:02,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:02,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 13:26:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 13:26:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-17 13:26:02,025 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 13:26:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:02,190 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-17 13:26:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 13:26:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-17 13:26:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:02,191 INFO L225 Difference]: With dead ends: 57 [2022-03-17 13:26:02,191 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 13:26:02,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-17 13:26:02,192 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:02,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:26:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 13:26:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 13:26:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 13:26:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-17 13:26:02,197 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-17 13:26:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:02,197 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-17 13:26:02,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 13:26:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-17 13:26:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 13:26:02,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:02,198 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:02,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:02,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 13:26:02,402 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 8 times [2022-03-17 13:26:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772155347] [2022-03-17 13:26:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:02,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:02,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:02,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179268646] [2022-03-17 13:26:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 13:26:02,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:02,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:02,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 13:26:02,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 13:26:02,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-17 13:26:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 13:26:03,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:03,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:03,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772155347] [2022-03-17 13:26:03,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:03,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179268646] [2022-03-17 13:26:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179268646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:03,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:03,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-17 13:26:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588985565] [2022-03-17 13:26:03,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:03,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 13:26:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 13:26:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 13:26:03,344 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-17 13:26:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:03,502 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-17 13:26:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 13:26:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-17 13:26:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:03,503 INFO L225 Difference]: With dead ends: 60 [2022-03-17 13:26:03,503 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 13:26:03,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-17 13:26:03,503 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:03,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 13:26:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 13:26:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 13:26:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 13:26:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-17 13:26:03,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-17 13:26:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:03,509 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-17 13:26:03,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-17 13:26:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-17 13:26:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 13:26:03,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:03,510 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:03,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 13:26:03,714 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 9 times [2022-03-17 13:26:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:03,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590823504] [2022-03-17 13:26:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:03,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:03,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278979953] [2022-03-17 13:26:03,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 13:26:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:03,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:03,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 13:26:04,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-17 13:26:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 13:26:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 13:26:04,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:04,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590823504] [2022-03-17 13:26:04,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278979953] [2022-03-17 13:26:04,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278979953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:04,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:04,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-17 13:26:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378772855] [2022-03-17 13:26:04,823 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:04,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 13:26:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 13:26:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-17 13:26:04,824 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-17 13:26:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:05,015 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-17 13:26:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 13:26:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-17 13:26:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:05,016 INFO L225 Difference]: With dead ends: 63 [2022-03-17 13:26:05,016 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 13:26:05,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-17 13:26:05,017 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:05,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 13:26:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 13:26:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-17 13:26:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 13:26:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-17 13:26:05,022 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-17 13:26:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:05,023 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-17 13:26:05,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-17 13:26:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-17 13:26:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 13:26:05,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:05,024 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:05,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:05,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 13:26:05,229 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 10 times [2022-03-17 13:26:05,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:05,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124185766] [2022-03-17 13:26:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:05,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:05,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:05,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163885482] [2022-03-17 13:26:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 13:26:05,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:05,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:05,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 13:26:05,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 13:26:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-17 13:26:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 13:26:06,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:06,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124185766] [2022-03-17 13:26:06,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163885482] [2022-03-17 13:26:06,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163885482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:06,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:06,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-17 13:26:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674455151] [2022-03-17 13:26:06,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:06,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 13:26:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 13:26:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-17 13:26:06,199 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-17 13:26:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:06,406 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-17 13:26:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 13:26:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-17 13:26:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:06,407 INFO L225 Difference]: With dead ends: 66 [2022-03-17 13:26:06,407 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 13:26:06,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-17 13:26:06,408 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:06,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 13:26:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 13:26:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-17 13:26:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 13:26:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-17 13:26:06,415 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-17 13:26:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:06,415 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-17 13:26:06,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-17 13:26:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-17 13:26:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-17 13:26:06,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:06,416 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:06,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:06,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 13:26:06,623 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 11 times [2022-03-17 13:26:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:06,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723574745] [2022-03-17 13:26:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:06,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:06,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904703895] [2022-03-17 13:26:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 13:26:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:06,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:06,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 13:26:07,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-17 13:26:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 13:26:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 13:26:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:08,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723574745] [2022-03-17 13:26:08,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904703895] [2022-03-17 13:26:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904703895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:08,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:08,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-17 13:26:08,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247990609] [2022-03-17 13:26:08,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:08,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 13:26:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 13:26:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-17 13:26:08,168 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 13:26:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:08,364 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-17 13:26:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 13:26:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-17 13:26:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:08,366 INFO L225 Difference]: With dead ends: 69 [2022-03-17 13:26:08,366 INFO L226 Difference]: Without dead ends: 64 [2022-03-17 13:26:08,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-17 13:26:08,370 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:08,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 13:26:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-17 13:26:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-17 13:26:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 13:26:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-17 13:26:08,382 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-17 13:26:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:08,383 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-17 13:26:08,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 13:26:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-17 13:26:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 13:26:08,384 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:08,384 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:08,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:08,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 13:26:08,608 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 12 times [2022-03-17 13:26:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182080795] [2022-03-17 13:26:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:08,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:08,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330700401] [2022-03-17 13:26:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 13:26:08,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:08,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:08,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 13:26:08,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-17 13:26:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-17 13:26:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-17 13:26:09,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:09,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182080795] [2022-03-17 13:26:09,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330700401] [2022-03-17 13:26:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330700401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:09,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:09,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-17 13:26:09,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807243383] [2022-03-17 13:26:09,842 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:09,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 13:26:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 13:26:09,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-17 13:26:09,843 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 13:26:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:10,133 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-17 13:26:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 13:26:10,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-17 13:26:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:10,134 INFO L225 Difference]: With dead ends: 72 [2022-03-17 13:26:10,134 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 13:26:10,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-03-17 13:26:10,135 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:10,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 745 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 13:26:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 13:26:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-17 13:26:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 13:26:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-17 13:26:10,141 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-17 13:26:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:10,141 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-17 13:26:10,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 13:26:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-17 13:26:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-17 13:26:10,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:10,142 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:10,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:10,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:10,347 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 13 times [2022-03-17 13:26:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:10,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707936543] [2022-03-17 13:26:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:10,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221989516] [2022-03-17 13:26:10,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 13:26:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:10,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 13:26:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:26:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-17 13:26:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-17 13:26:11,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:16,021 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse0 .cse1 4 .cse2) 4))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-17 13:26:20,108 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-17 13:26:20,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:20,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707936543] [2022-03-17 13:26:20,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:20,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221989516] [2022-03-17 13:26:20,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221989516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:20,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:20,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 13:26:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146664611] [2022-03-17 13:26:20,111 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:20,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 13:26:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 13:26:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=634, Unknown=2, NotChecked=102, Total=812 [2022-03-17 13:26:20,112 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 13:26:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:20,498 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-17 13:26:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 13:26:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-17 13:26:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:20,499 INFO L225 Difference]: With dead ends: 75 [2022-03-17 13:26:20,499 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 13:26:20,499 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=781, Unknown=2, NotChecked=114, Total=992 [2022-03-17 13:26:20,500 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:20,500 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 799 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 13:26:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 13:26:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 13:26:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 13:26:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-17 13:26:20,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-17 13:26:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:20,506 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-17 13:26:20,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 13:26:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-17 13:26:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-17 13:26:20,507 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:20,507 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:20,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-17 13:26:20,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 13:26:20,713 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 14 times [2022-03-17 13:26:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:20,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863139727] [2022-03-17 13:26:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:20,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:20,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395599745] [2022-03-17 13:26:20,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 13:26:20,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:20,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:20,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 13:26:21,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 13:26:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-17 13:26:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-17 13:26:21,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:21,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863139727] [2022-03-17 13:26:21,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:21,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395599745] [2022-03-17 13:26:21,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395599745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:21,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:21,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-17 13:26:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783303957] [2022-03-17 13:26:21,815 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:21,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 13:26:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 13:26:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-17 13:26:21,816 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-17 13:26:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:22,148 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-17 13:26:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 13:26:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-17 13:26:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:22,149 INFO L225 Difference]: With dead ends: 78 [2022-03-17 13:26:22,149 INFO L226 Difference]: Without dead ends: 73 [2022-03-17 13:26:22,150 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-17 13:26:22,150 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:22,150 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 13:26:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-17 13:26:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-17 13:26:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 13:26:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-17 13:26:22,156 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-17 13:26:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:22,156 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-17 13:26:22,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-17 13:26:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-17 13:26:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-17 13:26:22,157 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:22,157 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:22,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 13:26:22,362 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 15 times [2022-03-17 13:26:22,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:22,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842067955] [2022-03-17 13:26:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:22,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:22,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704384737] [2022-03-17 13:26:22,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 13:26:22,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:22,376 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 13:26:22,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-17 13:26:22,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:22,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 13:26:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-17 13:26:23,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:23,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842067955] [2022-03-17 13:26:23,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704384737] [2022-03-17 13:26:23,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704384737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:23,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:23,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 13:26:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992121075] [2022-03-17 13:26:23,538 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:23,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 13:26:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 13:26:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-17 13:26:23,539 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-17 13:26:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:23,886 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-03-17 13:26:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 13:26:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-17 13:26:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:23,887 INFO L225 Difference]: With dead ends: 81 [2022-03-17 13:26:23,887 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 13:26:23,887 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-17 13:26:23,888 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:23,888 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 13:26:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 13:26:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-17 13:26:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 13:26:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-17 13:26:23,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-17 13:26:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:23,914 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-17 13:26:23,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-17 13:26:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-17 13:26:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-17 13:26:23,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:23,915 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:23,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:24,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 13:26:24,116 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 16 times [2022-03-17 13:26:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317737631] [2022-03-17 13:26:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:24,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:24,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:24,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832765689] [2022-03-17 13:26:24,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 13:26:24,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:24,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:24,131 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:24,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 13:26:24,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 13:26:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-17 13:26:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-17 13:26:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:49,572 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-17 13:26:49,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:49,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317737631] [2022-03-17 13:26:49,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:49,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832765689] [2022-03-17 13:26:49,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832765689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:49,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:49,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 13:26:49,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314846369] [2022-03-17 13:26:49,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:49,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 13:26:49,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 13:26:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=5, NotChecked=58, Total=992 [2022-03-17 13:26:49,575 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-17 13:26:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:50,161 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-03-17 13:26:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 13:26:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-17 13:26:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:50,162 INFO L225 Difference]: With dead ends: 84 [2022-03-17 13:26:50,162 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 13:26:50,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=118, Invalid=1003, Unknown=5, NotChecked=64, Total=1190 [2022-03-17 13:26:50,163 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:50,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1007 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 13:26:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 13:26:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-17 13:26:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 13:26:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-17 13:26:50,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-17 13:26:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:50,171 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-17 13:26:50,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-17 13:26:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-17 13:26:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-17 13:26:50,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:50,173 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:50,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:50,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:50,373 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 17 times [2022-03-17 13:26:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046232708] [2022-03-17 13:26:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:50,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221459762] [2022-03-17 13:26:50,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 13:26:50,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:50,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:50,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:50,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 13:26:51,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-17 13:26:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:26:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-17 13:26:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:26:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-17 13:26:51,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:26:52,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:26:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046232708] [2022-03-17 13:26:52,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:26:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221459762] [2022-03-17 13:26:52,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221459762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:26:52,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:26:52,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 13:26:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13055178] [2022-03-17 13:26:52,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:26:52,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 13:26:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:26:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 13:26:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-17 13:26:52,080 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-17 13:26:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:26:52,441 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-03-17 13:26:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 13:26:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-17 13:26:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:26:52,442 INFO L225 Difference]: With dead ends: 87 [2022-03-17 13:26:52,442 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 13:26:52,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-17 13:26:52,443 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 13:26:52,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 13:26:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 13:26:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-17 13:26:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 13:26:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-17 13:26:52,449 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-17 13:26:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:26:52,449 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-17 13:26:52,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-17 13:26:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-17 13:26:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-17 13:26:52,450 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:26:52,450 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:26:52,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 13:26:52,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:52,651 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:26:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:26:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 18 times [2022-03-17 13:26:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:26:52,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667363916] [2022-03-17 13:26:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:26:52,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:26:52,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:26:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630059201] [2022-03-17 13:26:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 13:26:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:26:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:26:52,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:26:52,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 13:27:03,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-17 13:27:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:27:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-17 13:27:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:27:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-17 13:27:04,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:27:04,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:27:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667363916] [2022-03-17 13:27:04,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:27:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630059201] [2022-03-17 13:27:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630059201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:27:04,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:27:04,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-17 13:27:04,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718068143] [2022-03-17 13:27:04,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:27:04,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 13:27:04,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:27:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 13:27:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-17 13:27:04,237 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 13:27:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:27:04,659 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-17 13:27:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 13:27:04,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-17 13:27:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:27:04,660 INFO L225 Difference]: With dead ends: 90 [2022-03-17 13:27:04,660 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 13:27:04,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-17 13:27:04,661 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 13:27:04,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 13:27:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 13:27:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-17 13:27:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 13:27:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-17 13:27:04,671 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-17 13:27:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:27:04,672 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-17 13:27:04,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 13:27:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-17 13:27:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-17 13:27:04,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:27:04,674 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:27:04,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 13:27:04,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-17 13:27:04,874 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:27:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:27:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 19 times [2022-03-17 13:27:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:27:04,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606232589] [2022-03-17 13:27:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:27:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:27:04,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:27:04,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749798513] [2022-03-17 13:27:04,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 13:27:04,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:27:04,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:27:04,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:27:04,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 13:27:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 13:27:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-17 13:27:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:27:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-17 13:27:06,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:27:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:27:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606232589] [2022-03-17 13:27:06,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:27:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749798513] [2022-03-17 13:27:06,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749798513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 13:27:06,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 13:27:06,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-17 13:27:06,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517704213] [2022-03-17 13:27:06,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 13:27:06,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 13:27:06,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:27:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 13:27:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-17 13:27:06,217 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-17 13:27:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:27:06,729 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-17 13:27:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 13:27:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-17 13:27:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:27:06,732 INFO L225 Difference]: With dead ends: 93 [2022-03-17 13:27:06,732 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 13:27:06,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-17 13:27:06,733 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 13:27:06,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 13:27:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 13:27:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 13:27:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 13:27:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-17 13:27:06,740 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-17 13:27:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:27:06,740 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-17 13:27:06,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-17 13:27:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-17 13:27:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-17 13:27:06,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 13:27:06,744 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 13:27:06,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 13:27:06,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 13:27:06,951 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 13:27:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 13:27:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 20 times [2022-03-17 13:27:06,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 13:27:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201728015] [2022-03-17 13:27:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 13:27:06,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 13:27:06,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 13:27:06,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365267293] [2022-03-17 13:27:06,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 13:27:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:27:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 13:27:06,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 13:27:06,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 13:27:07,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 13:27:07,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 13:27:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-17 13:27:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 13:27:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-17 13:27:08,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 13:27:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-17 13:27:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 13:27:10,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201728015] [2022-03-17 13:27:10,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 13:27:10,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365267293] [2022-03-17 13:27:10,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365267293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 13:27:10,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 13:27:10,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 51 [2022-03-17 13:27:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279931872] [2022-03-17 13:27:10,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 13:27:10,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-17 13:27:10,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 13:27:10,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-17 13:27:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2022-03-17 13:27:10,432 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 48 states have internal predecessors, (100), 43 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2022-03-17 13:27:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 13:27:11,280 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-03-17 13:27:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 13:27:11,280 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 48 states have internal predecessors, (100), 43 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) Word has length 163 [2022-03-17 13:27:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 13:27:11,280 INFO L225 Difference]: With dead ends: 98 [2022-03-17 13:27:11,280 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 13:27:11,282 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 13:27:11,282 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 71 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 13:27:11,282 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1692 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 13:27:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 13:27:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 13:27:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 13:27:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 13:27:11,283 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2022-03-17 13:27:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 13:27:11,283 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 13:27:11,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 48 states have internal predecessors, (100), 43 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2022-03-17 13:27:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 13:27:11,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 13:27:11,285 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 13:27:11,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 13:27:11,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 13:27:11,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 13:27:12,746 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-03-17 13:27:12,747 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (not (< main_~c~0 main_~k~0)) (< 19 main_~k~0) (= main_~y~0 20) .cse1) (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (< 18 main_~k~0) (<= 19 main_~c~0) (<= main_~c~0 19) (= 19 main_~y~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-03-17 13:27:12,747 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (not (< main_~c~0 main_~k~0)) (< 19 main_~k~0) (= main_~y~0 20) .cse1) (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (< 18 main_~k~0) (<= 19 main_~c~0) (<= main_~c~0 19) (= 19 main_~y~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 3) (< 2 main_~k~0) .cse1 (= main_~c~0 3)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-03-17 13:27:12,747 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and (<= main_~k~0 20) (not (< main_~c~0 main_~k~0)) (< 19 main_~k~0) (= main_~y~0 20) .cse0) (and (= main_~x~0 0) (= main_~y~0 0)) (and (= main_~y~0 9) (<= main_~k~0 9) (< 8 main_~k~0) (<= main_~c~0 9) .cse0) (and (= main_~y~0 15) (< 14 main_~k~0) (<= main_~c~0 15) (<= main_~k~0 15) .cse0) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (<= main_~c~0 3) (= main_~y~0 3) (<= main_~k~0 3) (< 2 main_~k~0) .cse0) (and (< 12 main_~k~0) (<= main_~c~0 13) (<= main_~k~0 13) (= main_~y~0 13) .cse0) (and (<= main_~k~0 1) (= main_~y~0 1) (< 0 main_~k~0) .cse0 (<= main_~c~0 1)) (and (= main_~y~0 6) (<= main_~k~0 6) (< 5 main_~k~0) .cse0 (<= main_~c~0 6)) (and (<= main_~c~0 5) (<= main_~k~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (= main_~y~0 14) (< 13 main_~k~0) .cse0 (<= main_~k~0 14) (<= main_~c~0 14)) (and (= main_~y~0 12) (<= main_~c~0 12) (< 11 main_~k~0) .cse0 (<= main_~k~0 12)) (and (<= main_~k~0 10) (= main_~y~0 10) (<= main_~c~0 10) (< 9 main_~k~0) .cse0) (and (<= main_~k~0 7) (<= main_~c~0 7) (= 7 main_~y~0) .cse0 (< 6 main_~k~0)) (and (< 17 main_~k~0) (<= main_~c~0 18) (<= main_~k~0 18) .cse0 (= main_~y~0 18)) (and (<= main_~k~0 16) (= main_~y~0 16) .cse0 (< 15 main_~k~0) (<= main_~c~0 16)) (and (< 18 main_~k~0) (<= main_~c~0 19) (<= main_~k~0 19) (= 19 main_~y~0) .cse0) (and (<= main_~c~0 11) (< 10 main_~k~0) (= main_~y~0 11) (<= main_~k~0 11) .cse0) (and (<= main_~c~0 17) (<= main_~k~0 17) .cse0 (< 16 main_~k~0) (= main_~y~0 17)) (and (< 7 main_~k~0) (= main_~y~0 8) (<= main_~c~0 8) (<= main_~k~0 8) .cse0))) [2022-03-17 13:27:12,748 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)) [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 13:27:12,748 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-03-17 13:27:12,748 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-03-17 13:27:12,749 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-03-17 13:27:12,749 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-03-17 13:27:12,751 INFO L718 BasicCegarLoop]: Path program histogram: [20, 1, 1, 1] [2022-03-17 13:27:12,751 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 13:27:12,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 01:27:12 BoogieIcfgContainer [2022-03-17 13:27:12,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 13:27:12,768 INFO L158 Benchmark]: Toolchain (without parser) took 78601.04ms. Allocated memory was 189.8MB in the beginning and 298.8MB in the end (delta: 109.1MB). Free memory was 160.6MB in the beginning and 146.5MB in the end (delta: 14.1MB). Peak memory consumption was 175.4MB. Max. memory is 8.0GB. [2022-03-17 13:27:12,768 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory is still 147.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 13:27:12,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.28ms. Allocated memory was 189.8MB in the beginning and 248.5MB in the end (delta: 58.7MB). Free memory was 160.4MB in the beginning and 219.6MB in the end (delta: -59.2MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. [2022-03-17 13:27:12,769 INFO L158 Benchmark]: Boogie Preprocessor took 48.01ms. Allocated memory is still 248.5MB. Free memory was 219.1MB in the beginning and 218.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 13:27:12,769 INFO L158 Benchmark]: RCFGBuilder took 349.97ms. Allocated memory is still 248.5MB. Free memory was 218.1MB in the beginning and 208.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 13:27:12,769 INFO L158 Benchmark]: TraceAbstraction took 77854.42ms. Allocated memory was 248.5MB in the beginning and 298.8MB in the end (delta: 50.3MB). Free memory was 207.6MB in the beginning and 146.5MB in the end (delta: 61.1MB). Peak memory consumption was 163.9MB. Max. memory is 8.0GB. [2022-03-17 13:27:12,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory is still 147.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 326.28ms. Allocated memory was 189.8MB in the beginning and 248.5MB in the end (delta: 58.7MB). Free memory was 160.4MB in the beginning and 219.6MB in the end (delta: -59.2MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.01ms. Allocated memory is still 248.5MB. Free memory was 219.1MB in the beginning and 218.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 349.97ms. Allocated memory is still 248.5MB. Free memory was 218.1MB in the beginning and 208.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 77854.42ms. Allocated memory was 248.5MB in the beginning and 298.8MB in the end (delta: 50.3MB). Free memory was 207.6MB in the beginning and 146.5MB in the end (delta: 61.1MB). Peak memory consumption was 163.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.7s, OverallIterations: 23, TraceHistogramMax: 22, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 160 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 14255 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13158 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9267 IncrementalHoareTripleChecker+Invalid, 9383 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 1097 mSDtfsCounter, 9267 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2561 GetRequests, 2081 SyntacticMatches, 22 SemanticMatches, 458 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 31.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=22, InterpolantAutomatonStates: 351, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 59 PreInvPairs, 124 NumberOfFragments, 2035 HoareAnnotationTreeSize, 59 FomulaSimplifications, 1278 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 19.1s SatisfiabilityAnalysisTime, 45.5s InterpolantComputationTime, 1988 NumberOfCodeBlocks, 1979 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 2150 ConstructedInterpolants, 0 QuantifiedInterpolants, 9922 SizeOfPredicates, 49 NumberOfNonLiveVariables, 5190 ConjunctsInSsa, 1026 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 7504/12760 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((k <= 20 && !(c < k)) && 19 < k) && y == 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) || ((((k <= 20 && c == 16) && y == 16) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 15 < k)) || ((((7 == y && 7 == c) && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 6 < k)) || ((((y == 9 && k <= 20) && c == 9) && 8 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 1) && 0 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 1)) || ((((7 < k && y == 8) && k <= 20) && c == 8) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((c == 17 && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 16 < k) && y == 17)) || ((((y == 12 && k <= 20) && c == 12) && 11 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 4) && c == 4) && 3 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || (((((k <= 20 && 18 < k) && 19 <= c) && c <= 19) && 19 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((17 < k && k <= 20) && c == 18) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && y == 18)) || ((((k <= 20 && 5 == c) && 5 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 4 < k)) || ((((k <= 20 && y == 3) && 2 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 3)) || ((((k <= 20 && y == 10) && 9 < k) && c == 10) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((c == 15 && k <= 20) && y == 15) && 14 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && 0 <= k) && c == 0) && y == 0) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 2 && 1 < k) && k <= 20) && c == 2) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((12 < k && k <= 20) && c == 13) && y == 13) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((10 < k && k <= 20) && c == 11) && y == 11) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 6 && k <= 20) && c == 6) && 5 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 14 && k <= 20) && 13 < k) && c == 14) && y * y * y * y + y * y + y * y * y * 2 == x * 4) RESULT: Ultimate proved your program to be correct! [2022-03-17 13:27:12,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...